Manufacture of stable paraffin



Patented Mar, 15, 1938 UNITD MANUFACTURE or strain P No Drag.Application February Ill, 1936, Serial No. 63,278

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Paraflin as ordinarily refined, if subjected very much to heatdeteriorates and becomes discolored. Particularly for example, where aparamn bath has to be maintained in which the paramn is heated as in theparaifining of paper and other articles to be water proofed etc., suchdimculties are encountered. In accordance with the present inventionhowever, it now becomes possible to prepare paraffin obviating suchdrawbacks.

To the accomplishment of the foregoing and related ends, the invention,then, comprises the features hereinafter fully described, andparticularly pointed out in the claims,'the following descriptionsetting forth in detail certain illustrative embodiments of theinvention,'these beingindicative however, of but a few of the variousways in which the principle of the invention may be employed.

The parafiin, obtained from any usual or desired source, as for instanceparaffin-bearing petroleum oil, is decolorized, as by treatment withsulphuric acid, sulphur dioxide, etc., and while in molten conditionthere is incorporated a small amount of atetrahydroxybicyclospiroindane, as for instance 3,3,3,3 tetramethyl5,6,5',6 tetrahydroxybicyclospiroindane, etc. The amount of suchtreating agent is in general small. It need not exceed 1 per cent.Amounts of 0,001 to 0.5 per, cent are satisfactory.

As an example: Paramn in molten condition is treated by incorporation of0.01 per cent of 3,3,3',3' tetramethyl 5,6,5,6'tetrahydroxybicyclospiroindane,

10 1130 \CHS and the paraffin after thorough stirring, is cooled and.solidified in cake or other desired form.

Other modes of applying the principle of the invention may be employed,change being made as regards the details described, provided thefeatures stated in any of the following claims, or the equivalent ofsuch, be employed.

We therefore particularly point out and dis tinctly claim as ourinvention:-

